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Test your basic knowledge |
Dairy Cattle And Reproduction
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Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
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study here
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Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 16-20 hours
dry matter and water
cow estrus
visual evaluation (BSE)
Grading choice
2. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders
estrus
Mares
cow gestation
effects of BST
3. Larger the cow - more milk is produced; smaller the cow - less milk is produced
#1 cost in production
Size of cow in relation to the amount of milk produced
~1 month
monestrous
4. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm
Follical Stimulating in males
Jersey Cow
#1 cost in production
Brown Swiss Cow
5. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
Reasons for gestation length being affected
accessory sex glands
reason for seasonal breeding periods
6. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.
Reasons for gestation length being affected
Avg. bull specs
~1 month
polyestrous
7. Knife-loose ~1wk of growth. band-loose ~2wks of growth.
Where livelihood is in agriculture
behavioral signs of estrus
growth lost from castration methods (knife & band)
ewe estrus cycle
8. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm
polyestrous
Follical Stimulating in males
scrotal circumference (BSE)
cremaster muscle
9. Days which have decreasing daylight hours
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10. Knife-loose ~1wk of growth. band-loose ~2wks of growth.
hormones
organs used in spermatogenesis
colostrum
growth lost from castration methods (knife & band)
11. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has
sertoli cells
reasons for castration
rectal palpation (BSE)
libido test (BSE)
12. 1-3 days
why does the cow need fat deposits during pregnancy?
sow estrus
what has to happen for males for copulation to occur
Sperm growth rate
13. Animals which have many estrous periods per year (ex: cow - sow)
testis (gonads)
Holstein Cow
epididymis: definition - 3 parts - 4 functions
polyestrous
14. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market
reasons for castration
estrus
what has to happen for males for copulation to occur
behavioral signs of estrus
15. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract
eminal vesicles
leydid or interstitial cells
sow ovulation
estrus
16. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co
scrotal circumference (BSE)
ewe estrus cycle
effects of BST
scrotal circumference (BSE)
17. 265-285 days
epididymis: definition - 3 parts - 4 functions
monestrous
estrus
Dairy Cattle Gestation
18. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off
elastrator
humans: stress level vs sperm
accessory sex glands
6-8 weeks
19. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.
sigmoid flexure
Avg. bull specs
penis sizes vs delivering methods
castration
20. 10-37 (21) days
things to check for in a breeding soundness exam (BSE)
mare estrus cycle
visual evaluation (BSE)
estrus
21. Failure to have one testis (gonad) to descend
dry-off time in dairy cattle
monorchid
age and castration
oviducts
22. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed
age and castration
Avg. bull specs
cow estrus
Mares
23. Days which have decreasing daylight hours
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24. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat
Size of cow in relation to the amount of milk produced
mare estrus
Hard
Holstein Cow
25. (male) pushes the testes upward toward the body for warmth or protection
reasons for castration
libido test (BSE)
dartos muscle
sow estrus
26. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)
retractor muscles
visual evaluation (BSE)
accessory sex glands
Dairy Cattle Gestation
27. Look for infection - split - and rupture of the penis
Grading choice
rectal palpation (BSE)
penis and prepuce observation (BSE)
growth lost from castration methods (knife & band)
28. Larger the cow - more milk is produced; smaller the cow - less milk is produced
prostate gland
burdizzo
Size of cow in relation to the amount of milk produced
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
29. Allows extension of penis without fibro-elastic penis
dry matter and water
sigmoid flexure
normal presentation of the fetus
sow gestation
30. What helps regulate spermatogenesis?
testosterone
purpose of Breeding Soundness Exam (BSE) for males
ewe gestation
ewe ovulation
31. 283 days
dry matter and water
cow gestation
visual evaluation (BSE)
Blood
32. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days
~1 month
estrus
dartos muscle
epididymis: definition - 3 parts - 4 functions
33. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation
things to check for in a breeding soundness exam (BSE)
spermatogenesis
polyestrous
kidney stones also called ________ ___________ can develop in the sigmoid flexure
34. Actual heat cycle (period)
Lutinizing Hormone in females
growth lost from castration methods (knife & band)
reason for seasonal breeding periods
estrus
35. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.
rectal palpation (BSE)
sow ovulation
oviducts
purpose of Breeding Soundness Exam (BSE) for males
36. When are steers and heifers weaned from bottle feeding?
mare gestation
6-8 weeks
scrotum
Blood
37. FEED
reason for seasonal breeding periods
~1 month
monorchid
#1 cost in production
38. 114 days
ewe gestation
sow gestation
feeding a high producing dairy cow
spermatogenesis
39. 1-3 days
sow gestation
Follical Stimulating in females
sow estrus
sertoli cells
40. Prevent the cow from getting an infection from the calve
prostate gland
Dairy calves are removed from cow at birth to...
visual evaluation (BSE)
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
41. 10-37 (21) days
behavioral signs of estrus
feeding a high producing dairy cow
seasonally polyestrous
mare estrus cycle
42. ~305 days (altough often longer due to breeding difficulties)
Dairy Cattle Lactation (standard)
Grading choice
penis and prepuce observation (BSE)
van deferens
43. Help to signal hormone levels which we need both in the brain right next to each other.
sow estrus
sow estrus cycle
estrus
hypothalamus and pituitary gland
44. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.
estrous
pelvis
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
hormones
45. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat
castration
functions of progestrone
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
Dairy calves are removed from cow at birth to...
46. What about the sperm for a bull which has been castrated but still has testicles?
penis and prepuce observation (BSE)
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
Sperm survival specs
prostate gland
47. What makes the milk flow through the mammary glands?
Blood
penis proper
why does the cow need fat deposits during pregnancy?
sow ovulation
48. Why does estrus happen before ovulation?
Jersey Cow
monestrous
libido test (BSE)
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
49. Animals which have only one estrous cycle (ex: dog - fox)
semen evaluation (BSE)
monestrous
effects of BST
Hormones from both the fetus and the mom.
50. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.
reasons for castration
pelvis
scrotal circumference (BSE)
eminal vesicles
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